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4
Installation
2. Requirements Fluid Category 4 systems (fig see
right)
z Control valve (stop valve) on the mains cold water
supply pipe
z Strainer
z Verifiable Backflow Prevention Device with reduced
pressure Zone (RPZ valve assembly) incorporating
a Type BA air gap
z Tundish
z Control valve (stop valve) on the heating system
pipework
z Open the cap of the automatic air vent by one full
turn to allow air to escape.
z Slowly fill the heating system. Observe the pressure
gauge whilst filling.
z Close the water tap and the boiler drain valve once
the required operating pressure has been reached.
z Bleed the system via the radiator bleed valves.
z Top up with water if the pressure drops as a result
of bleeding the system.
z Take the hose off the boiler drain valve.
SYSTEM DAMAGE
through frequent topping up.
z The heating system may be damaged,
depending on water quality, by corrosion
or scaling if you frequently need to top-up
the heating water.
V
z Enquire from your installer, whether you can use
your public water untreated or whether you need to
treat it before filling your system.
z Notify your installer, if you need to regularly add top-
up water to your system.
28
Fig 35 Requirements Fluid Category 4 systems
Logano GE615 - We reserve the right to make any changes due to technical modifications.
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